Modeling Linear Polarization of the Didymos–Dimorphos System before and after the DART Impact
We analyze the polarization observations of the Didymos–Dimorphos system before and after the impact by the NASA Double Asteroid Redirection Test spacecraft on Dimorphos. We fit empirical polarization phase curve models and statistically confirm the discovery by Gray et al. about the degree of linea...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | The Planetary Science Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/PSJ/ad1757 |
| _version_ | 1797337680344776704 |
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| author | Antti Penttilä Karri Muinonen Mikael Granvik Zuri Gray Stefano Bagnulo Ludmilla Kolokolova Fernando Moreno |
| author_facet | Antti Penttilä Karri Muinonen Mikael Granvik Zuri Gray Stefano Bagnulo Ludmilla Kolokolova Fernando Moreno |
| author_sort | Antti Penttilä |
| collection | DOAJ |
| description | We analyze the polarization observations of the Didymos–Dimorphos system before and after the impact by the NASA Double Asteroid Redirection Test spacecraft on Dimorphos. We fit empirical polarization phase curve models and statistically confirm the discovery by Gray et al. about the degree of linear polarization of the system decreasing on the impact and remaining altered for at least 30 days post-impact. With numerical simulations of particles in the geometric optics domain, we estimate the dominant size of the particles either in the regolith of Didymos and Dimorphos or in the impact-driven ejecta cloud to be several hundred micrometers. The observed change between the pre-impact and post-impact systems indicates either a decrease in average particle size of some tens of micrometers or a decreased level of space weathering. |
| first_indexed | 2024-03-08T09:16:05Z |
| format | Article |
| id | doaj.art-57d5efe852c145cc9d9f10b85f7bd2ba |
| institution | Directory Open Access Journal |
| issn | 2632-3338 |
| language | English |
| last_indexed | 2024-03-08T09:16:05Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Planetary Science Journal |
| spelling | doaj.art-57d5efe852c145cc9d9f10b85f7bd2ba2024-01-31T14:58:07ZengIOP PublishingThe Planetary Science Journal2632-33382024-01-01512710.3847/PSJ/ad1757Modeling Linear Polarization of the Didymos–Dimorphos System before and after the DART ImpactAntti Penttilä0https://orcid.org/0000-0001-7403-1721Karri Muinonen1https://orcid.org/0000-0001-8058-2642Mikael Granvik2https://orcid.org/0000-0002-5624-1888Zuri Gray3https://orcid.org/0000-0002-6610-1897Stefano Bagnulo4https://orcid.org/0000-0002-7156-8029Ludmilla Kolokolova5https://orcid.org/0000-0002-9321-3202Fernando Moreno6https://orcid.org/0000-0003-0670-356XDepartment of Physics, P.O. Box 64, FI-00014 University of Helsinki , Finland ; antti.i.penttila@helsinki.fiDepartment of Physics, P.O. Box 64, FI-00014 University of Helsinki , Finland ; antti.i.penttila@helsinki.fiDepartment of Physics, P.O. Box 64, FI-00014 University of Helsinki , Finland ; antti.i.penttila@helsinki.fi; Asteroid Engineering Laboratory, Luleå University of Technology , Box 848, SE-98128 Kiruna, SwedenArmagh Observatory & Planetarium, College Hill , Armagh, BT61 9DG, UK; Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London , Holmbury St. Mary, Dorking, Surrey RH5 6NT, UKArmagh Observatory & Planetarium, College Hill , Armagh, BT61 9DG, UK; Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London , Holmbury St. Mary, Dorking, Surrey RH5 6NT, UKDepartment of Astronomy, University of Maryland , College Park, MD 20742-2421, USAInstituto de Astrofísica de Andalucá , CSIC, Glorieta de la Astronomia s/n, E-18008 Granada, SpainWe analyze the polarization observations of the Didymos–Dimorphos system before and after the impact by the NASA Double Asteroid Redirection Test spacecraft on Dimorphos. We fit empirical polarization phase curve models and statistically confirm the discovery by Gray et al. about the degree of linear polarization of the system decreasing on the impact and remaining altered for at least 30 days post-impact. With numerical simulations of particles in the geometric optics domain, we estimate the dominant size of the particles either in the regolith of Didymos and Dimorphos or in the impact-driven ejecta cloud to be several hundred micrometers. The observed change between the pre-impact and post-impact systems indicates either a decrease in average particle size of some tens of micrometers or a decreased level of space weathering.https://doi.org/10.3847/PSJ/ad1757Asteroid surfacesNear-Earth objectsPolarimetry |
| spellingShingle | Antti Penttilä Karri Muinonen Mikael Granvik Zuri Gray Stefano Bagnulo Ludmilla Kolokolova Fernando Moreno Modeling Linear Polarization of the Didymos–Dimorphos System before and after the DART Impact The Planetary Science Journal Asteroid surfaces Near-Earth objects Polarimetry |
| title | Modeling Linear Polarization of the Didymos–Dimorphos System before and after the DART Impact |
| title_full | Modeling Linear Polarization of the Didymos–Dimorphos System before and after the DART Impact |
| title_fullStr | Modeling Linear Polarization of the Didymos–Dimorphos System before and after the DART Impact |
| title_full_unstemmed | Modeling Linear Polarization of the Didymos–Dimorphos System before and after the DART Impact |
| title_short | Modeling Linear Polarization of the Didymos–Dimorphos System before and after the DART Impact |
| title_sort | modeling linear polarization of the didymos dimorphos system before and after the dart impact |
| topic | Asteroid surfaces Near-Earth objects Polarimetry |
| url | https://doi.org/10.3847/PSJ/ad1757 |
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